Pencil



F. J. KRISTOFEK.

PENCIL.

APPLICATION FILED MAY 3,1920.

1,860,230, Patented Nov. 23, 1920.

UNITED STATES FRANK J. xmsror'nmon sr. PAUL, MINNESOTA... ASSIGNOR ro BROWN & BIGEiiow, on

PATENT OFFICE.

. ST. PAUL, MINNESOTA, A CORPORATION OF MINNESOTA.

To all whom it mag/concern:

Be it known that I, J. KRis'roFnK, a citizen of the United ,States,residing at St. Paul, in the county of Ramsey and State of Minnesota, have-invented a newand useful Improvement in Pencils, ofwhich the following is a specification.

This invention relatesrto improvement pencils, the primary object of which-is to provide a s mple structure for holding the propelling mechanismof the pencil in the casing or barrel, whichincloses the same, so

that the propelling means is firmly held for operation when in the'barrel or can be removed to insert a new marking lead in the socket of the propelling means.

It is. also an object of this invention to provide means for frictionally engaging a portion of the propelling means to prevent free rotation of the same when inclosed in the pencil casing. By means of this structure the lead propelling means is held against free rotation to prevent the lead held in marking positionin the pencil from slipping. The frictional engagement of-a por tion of the propelling means also prevents the operating head of the pencil from rotating too freely.

In the drawing forming part of this specification: p

Figure 1 is a side elevation of the pencil.

Fig.2 is a side elevation of the propelling means removed from the pencil casing.

Fig. 3 is a detail of a portion ofthe pencil. Fig. 4 is an alternative construction of operating-head for the pencil.

[The drawings illustrate the pencil A with an outer'barrel or casing 10, which is formed of hollow tubing, having its forward end 11 swaged to a conical shape, while the rear end 12 is formed with an openingto receive the lead propelling means, of the penc l.-

The barrel 10 is formed cylindrical with a smooth inner contour from the rear end 12 to the conical end 11, and the apex 13 of the conical end 11 is provided with an axial opening which is approximately the same diameter as the marking lead used in the pencil.

The propelling mechanism B of the pencil A is formed with a threaded tubular member 14, which contains a longitudinally slotted tubular member 15, in which a driving member, having a socket 16, is adapted to slide, the driving member being formed IIENGIL.

member 14, while-the driving :member is of ordinaryconstruction. A suitable collar 18 is rigidly attached to the forward-end of the slotted tube 15, while-a collar 19, having an operating head 20 formed thereon, is rigidly connected on the rearend of themember 15 so that the collars 18 and 19 form shoulders for the ends of the tubular member 14- to hold, the slotted tube 15 freely rotatable therein with the collars 18 and 19 rotatable at either end of the threaded member 14 but these members being held against'longitudinal movement in relation'to the threaded member 14.-

A spring sleeve 21 isrigidly secured at its forward endi22 by soldering, or any other suitable means, to the threaded member 14, while the rear portion thereof. is flared outwardly to simulate a frustorconical shape. Projecting from the rear edge 23 of the member, 21 is a tongue 24, which is; formed with a depressed portion 25; Thetongue 24 The threaded member 14, together with the collars 18 and 19, is slightly smallerin diameter than the. inner diameter of the I barrel 10. Thus when the propelling mechanism B is inserted into the rear end 12 of the Specification ofLetters Patent. Patented No gg 1920 7 Application filed May 3, 132(1. Serial No. 378,442.

pencil A, the spring collar 21, which can be I made of any suitable length, is adapted to U the head 20 of the propelling mechanism,

the same can be removed from the barrel 10.

When the propelling mechanism is inserted in the-barrel the spring sleeve 21 is Y contracted and the tongue 24,, with the depressed portion 25, is brought into contact with the collar 19 to frictionally engage the collar so that when the operating head 20 is rotated to operate the propelling mechanism of the pencil the tongue 24 will engage and hold the head 20 against free rotation and thus prevent the propelling mechanism from operating too freely. In this manner sufiicientfriction is provided to hold the operating mechanism in any position in which it is set by the head 20 and to propel a marking lead 26 out of the apex 13 of the pencil. This spring tongue 2 1 is important in the construction of this pencil as 1t pro vides a simple, inexpensive means for hold-s the pencil casing 10, while the casing 10 is extremely simple, being formed of a thin tubing, the forward end of which is swaged into the desired shape with an opening in the apex for the marking lead. VVhenthe old markinglead is worn out, thepropelling mechanism is removed and the stub remain ing in the socket 16 of the marking lead is removed, while a new marking lead is then inserted into the socket 16 and the propelling mechanism operated by the head 20 to withdraw the marking lead into the propelling mechanism B, whereupon the mechanism Bis then reinserted into the barrel l0 and thepencil is again ready for use.

The construction illustrated in Fig. tprovides an operating head with a collar 19, which is similar to the collar 19, while the operating head 20' is formed Witha'holding ring 27 so thatthe pencil can be readily attached-to a chain if it is so desired.

A. feature of this invention is the simple, inexpensive construction and particularly that feature of the spring sleeve 21 and tongue 14:. 7

Inaccordance with the patent statutes I have described the principles of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, but I desire to have it understood that the construction shown is only illustrative and that the invention can be carried out by other means and applied to uses other than those above set forth within the scope or the following claims:

I claim:

1. A pencil, including a tubularbarrel, a propelling means and a spring sleeve secured to said propelling means adapted to be contracted by said barrel when said propelling means is inserted therein to hold said propelling means in said barrel.

2. A pencil, including a tubular barrel, a propelling means comprising relatively fixed and rotatable portions, a spring collar secured to the fixed portion of said propelling means and a tongue formed on said spring collar adapted to engage the rotatable portion of said propelling means, whereby said spring collar and tongue are adapted to hold the fixed portion of said propelling means against longitudinal and rotary movement in said barrel and-said tongue is adapted to frictionally engage the rotatableportion of said propelling means, respectively, for the purposes specified. I

A pencil coniprismg a barrel, a propelling means comprising relatively fixed and rotatable portions andimeansadapted to frictionally hold the fixed-portion of said propelling means against rotation in said barrel and to frictionally'engage the rotat able portion of said propelling means to hold it against free movement when contained in said barrel. 7

at. A pencil, comprising a tubular barrel,

having a smooth inner contour oi the same inner shape as the'outer shape of said barrel, a lead propelling means, including a threaded member and a relatively rotatable portion, means secured to said threaded member adapted to frictionally hold said threaded member in said'pencil barrel against longitudinal or rotary movement and means adapted to engage said rotatable portion or" said propelling means to prevent tree rotation of said rotatable I portion.

5. A pencil, a barrel, a removable lead propelling means, said propelling means including a rotatable portion and a threaded portion and means adapted to hold said threaded portion by friction against movement in sald barrel and to simultaneously engage said rotatable portion of said-prm pelling means toprevent free rotation there of in the operation of said pencil.

6. A pencil, a barrel, a lead propelling means comprising relative fixed and rotatable portions, means'connected to said fixed portion of the propelling means adapted to hold the same against movement in said barrel and to simultaneously frictionally engage the rotatable portion of said propelling means to prevent free rotationlof the same in-the operation of said pencil.

FRANK J. KRISTOFEK. 

